28910621144223 has 144 divisors (see below), whose sum is σ = 51814620000000. Its totient is φ = 15209615296512.

The previous prime is 28910621144183. The next prime is 28910621144257. The reversal of 28910621144223 is 32244112601982.

28910621144223 is a `hidden beast` number, since 2 + 8 + 9 + 1 + 0 + 6 + 211 + 4 + 422 + 3 = 666.

It is not a de Polignac number, because 28910621144223 - 2⁸ = 28910621143967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28910621154223) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 8763448228 + ... + 8763451526.

It is an arithmetic number, because the mean of its divisors is an integer number (359823750000).

Almost surely, 2^{28910621144223} is an apocalyptic number.

28910621144223 is a deficient number, since it is larger than the sum of its proper divisors (22903998855777).

28910621144223 is a wasteful number, since it uses less digits than its factorization.

28910621144223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5246 (or 5230 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 28910621144223 in words is "twenty-eight trillion, nine hundred ten billion, six hundred twenty-one million, one hundred forty-four thousand, two hundred twenty-three".